Extensible trolley-pole



E. C. DIETRICH AND C. W. BLISS.

EXTENSIBLE TROLLEY POLE.

APPLICATION map IAN-.29, 1920.

3 5 .2 3 M v 2% r W w wfw ill!!! llllllld" illllllldn Witness:-

UNITED STATES PATENT OFFICE.

EDWARD G. DIETRICH AND CHARLES W. BLISS, OF SOUTH BEND, INDIANA.

EXTENSIBLE TROLLEY-POLE.

T 0 all whom it may concern:

Be it known that We, EDWARD G. DIETRICH and CHARLES W. BLIss, citizensof the United States, residing in the city of South Bend, county of St.Joseph, Indiana, have invented new and useful Improvements in ExtensibleTrolley-Poles, of which the following'is a specification.

Our invention relatesto extensible trolley poles, and especially to atrolley pole of the class describedin which a telescopic member isactuated by compressed air or fluid under pressure. 1

An object of our invention is the production of a simple and effectiveextensible trolley pole wherein the extensible member is actuated bycompressed air issuing through a stationary piston arranged within theextensible pole member. Another object is the production of anextensible trolley pole wherein antifriction bearings are provided tofacilitate the actuation of the extensible pole member. Other objects ofour invention are mentioned and described herein.

The preferred embodiment of our inven tion is illustrated F on' theaccompanying drawing in which Figure 1 is a section in elevation throughthe pole and a fragment of a forked pole support; Fig. 2 is a sectiontaken on the line 22 of Fig. 1; and Fig.

I 8 is a section taken on the line 3-3 of I I Fig. 1. 1 b'imilarnumerals of reference indicate like members and parts of membersthroughout the several views on the draw- 1n if} Tteferring to thedrawing in detail, the numeral 1 indicates a tubular pole member thelower end whereof is clamped within a socket formed in a pole forkmember 2, the detachable cap 3, which is fastened or clamped to polemember 1 by bolts 4, 4 constituting a part of said socket. The fork 2may be formed in any suitable manner and is adapted to be pivotally'mounted upon a trolley car top or roofnot shown the lower extremities ofsaid fork not being disclosed in the drawing.

The numeral 5 indicates a hollow or tubular pole stepmember screwthreaded into the lower end of the pole member 1 and provided with anannular head or flange member 6 on the lower end thereof, said flangebeing adapted to be clamped within Specification of Letters Patent.Patent d O t 19 1920 Application filed January 29, 1920. Serial No.354,812.

the annular recess or chamber 7 to prevent longitudinal displacement ofthe pole 1.

The numeral 8 indicates a tubular roller bearing carrier member withinwhich the upper end of the pole 1 may be screw threaded at 9, saidcarrier member being provided with the opening 10 within which thehollow telescopic pole member 11 is movablyarranged. The pole 11 ispreferably square or polygonal in cross-section and extends upwardthrough the aperture 10 and downwardly and interiorly of the fixed pole1,'a harp 12 being mounted upon the upperend thereof and by which saidpole end may be plugged. The numeral13 indicates a hollow polebushingmember rigidly fastened within the telescopic pole 11 in any suitablemanner and extending substantially from the lower end thereof to a pointintermediate the extremities thereof. The bushing 13 may be providedwith the cylindrical bore 14 within which through the hollow piston rod16 into the upper part of the hollow pole 11. The numeral 19 indicates acoil buffer spring arranged within the upper end of the pole 1 andencompassing the pole member 11, said spring being seated against theface 20 interiorly of the carrier 8, and -the annular flange 21disposedinteriorly of'and upon the pole 1. The numeral 22 indicates anannular buffer or stop collar encompassing the pole 11 and rigidlysecured thereto adjacent the lower end thereof but spaced therefrom,which collar is adapted to engage the spring 19 under an extreme outeror upward movement of the pole 11 to cushion the contact therewith andto prevent the displacement of the pole member 11 from the interior ofpole member 1. I

The member 8 may be provided with four antifriction roller bearingmembers '23, 24, 25 and 26, respectively, arranged in rectangularformation, and mounted upon suitable terior faces of the pole 11 andserve both I as guides therefor and to reduce friction created when thepole is actuated telescopi-' cally of the member 1. v Numerals 36 and 37indicate electric conductor members which maybe rigldly fastened to anduponopposite sides of the car rier member 8 by screws 38, 38 andprovided with the hemispherical points 39 39 to conduct the electriccurrent from pole 11 to pole 1 around the member 8. I

Obviously, when compressed air, or fluid under pressure, is admitted tothe interior of the pole 11 through the hollow piston rod 16, the .pole11 is projected upward and outward and a trolley wheelnot shownwhich maybe carried by the harp 12 will be held against the overhead currentsupply wire.

We claim:

'1. A pneumatic. extensible trolley pole comprising an outer hollow polemember; a hollow telescopic pole member slidably arranged withinsaidouter pole member and projecting therefrom, said telescopic polemember being closed at its outer end; a stationary piston fitted withinsaid telescopic pole member and around which said pole is slidable; andmeans for the introduction of fluid under pressure to the interior ofthe telescopic pole member for outward actuation thereof. V g

2. A pneumatic extensible trolley pole comprisi an outer hollow polemember; a hollowifilescopic pole member slidably arranged within saidouter pole memberand projecting therefrom, said telescopic pole memberbeing closed at :itsouter end; a stationary piston fitted within saidtelescopic pole member and around which said pole is slidable; means forthe introduction of fluid under pressure to the, interior of thetelescopic pole member for outward actuation thereof; "and means forlimiting the outward movement of said telescopic pole member. V T

3. A pneumatic extensible trolley ole comprising an outer hollow polemem er; a hollow telescopic .pole member slidably arranged within saidouter pole member and projecting therefrom,lsaid telescopic pole memberbeing closed at its outer end; a stationary piston fitted within saidtelescopic means for the introduction of fluid under pole and aroundwhich saidpole'is slidable; meansf-or the introduction offluid underpressure to the interior ofthe telescopic pole for outward actuationthereof; and resilient l. A pneumatic extensible trolley pole comprisingan outer hollow pole member; a hollow telescopic pole member slidablyarranged within said outer pole member and projecting therefrom,saidtelescopic pole member being closed at its outer end; a hollowstationary piston rod within said te'lescopic pole member; a pistonmounted on said piston rod and around whichsaid telescopic pole -isslidable; and means for the introduction of fluid under pressure throu hsaid piston rod to the interior of the to escopicpole member for outwardactuation thereof;

5. A pneumatic extensible trolley pole comprising an outer hollow pole.member; a hollow "telescopic pole member slidably arranged within saidouter pole member and projecting therefrom, said telescopic pole beingpolygonal in cross-section and closed :at itsouter end; a stationarypiston fitted within said telescopic pole member means for limiting theoutward movement of the telescopic pole member.

and around which said pole is slid'able;

pressure tothe interior of the telescopic pole'member. for outwardactuation thereof; and means 7 for limiting the outward movement of saidtelescopic pole member.

6. A pneumatic extensible trolley pole comprising an outer hollow polemember; a hollow telescopic pole member slidably arranged within saidouter polemember and projecting therefrom, said p'ole beingclosed at itsouter end; a stationary piston fitted within said telescopic pole andaround which said poleris slidable; means for'the introduction of fluidunder pressureto the interior of the telescopic pole for outward'actuationthereof; and means to prevent the rotation of said telescopicpole member. 1

[7. A pneumatic extensible trolley pole comprising an outer hollow polemember; a r

hollow telescopic pole member slidably arranged within saidouter polemember and projecting therefrom, said telescopic pole. member beingclosed at its outer end a stationary piston 'fitted within said.telescopic ,polemember and around whichasaid' v pole is slidable; meansfor the introduction of fluid'under pressure to the interior of thetelescopic pole member for outward actuation thereof; and anti-frictionbearings carried by the outer pole member and adapted to bear againstthe telescopic'pole 1'25 membenw 8. A pneumatic extensible trolley polecomprising an outer hollow pole member;

a hollow telescopic pole member slidably arranged within said outer poleand'pro- 1 jecting therefrom, said telescopic member being closed at itsouter end; a hollow stationary piston rod within said telescopic pole; apiston mounted on said piston rod and around which said telescopic poleis slidable; means for the introduction of fluid under pressure throughsaid piston rod to the interior of said telescopic pole for outwardactuation thereof; and means to limit the outward movement of saidtelescopic pole, said means comprising a coil spring seated within saidouter pole member, and a butler member carried by said telescopic polemember adapted to engage said sprin 9. A pneumatic extensible trolley poe comprising an outer hollow pole member; a hollow telescopic polemember slidably arranged within said outer pole member and projectingtherefrom, said telescopic pole being closed at its outer end andprovided with an interior lining or bushing; a stationary piston fittedwithin the bushing of said telescopic pole member and around which saidpole and bushing are slidable;

and means for the introduction of fluid under pressure to the interiorof the telescopic pole member for outward actuation thereof.

10. A pneumatic extensible trolley pole comprising a hollow outer polemember; a base member upon which said pole is rigidly mounted; a hollowtelescopic. pole member rectangular in cross-section slidably arrangedwithin said outer pole mem her, said pole being closed at its outer endand provided with a bushing or lining having a cylindrical bore; astationary piston fitted with-in said telescopic pole member bushing.and around which said bushing and pole are slidable; and means for theintroduction of fluid under pressure to the interior of the telescopicpole member for outward actuation thereof.

In testimony whereof we have hereunto afiixed our signatures this 10thday of J anuary, 1920.

EDWARD C. DIETRICI L. CHARLES W. BLISS.

